Changing allow_reuse_address's default value, and documenting it.
diff --git a/Doc/lib/libsocksvr.tex b/Doc/lib/libsocksvr.tex
index 18a2fe8..df53063 100644
--- a/Doc/lib/libsocksvr.tex
+++ b/Doc/lib/libsocksvr.tex
@@ -94,6 +94,11 @@
 
 The server classes support the following class variables:
 
+\begin{datadesc}{allow_reuse_address}
+Whether the server will allow the reuse of an address. This defaults
+to true, and can be set in subclasses to change the policy.
+\end{datadesc}
+
 \begin{datadesc}{request_queue_size}
 The size of the request queue.  If it takes a long time to process a
 single request, any requests that arrive while the server is busy are